GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Wiper/Washer Rear System Check performed?

--

Go to Step 2

Go to Wiper/Washer Rear System Check

2

Does the rear washer pump operate?

--

Go to Step 3

Go to Rear Washer Inoperative

3

Check for an open RR W/W fuse in the Underhood Fuse Block.

Was an open fuse found?

--

Go to Step 4

Go to Step 5

4

Replace the open fuse.

Is the replacement complete?

--

Go to Wiper/Washer Rear System Check

--

5

  1. Disconnect the harness connector from the rear wiper motor.
  2. Connect a test light from the harness connector, terminal C, to ground.

Is the test light on?

--

Go to Step 7

Go to Step 6

6

Repair the open in CKT 1240.

Is the repair complete?

--

Go to Wiper/Washer Rear System Check

--

7

  1. Close the end gate and the lift gate.
  2. Set the rear wiper/washer switch to LO.
  3. Turn the ignition switch to ON.
  4. Connect a test light from the harness connector, terminal B, to ground.

Is the test light on?

--

Go to Step 8

Go to Step 11

8

Connect a test light from the rear wiper motor harness, terminal C to terminal A.

Is the test light on?

--

Go to Step 10

Go to Step 9

9

Repair the open in CKT 1350.

Is the repair complete?

--

Go to Wiper/Washer Rear System Check

--

10

Replace the rear wiper motor. Refer to Rear Window Wiper Motor Replacement

Is the replacement complete?

--

Go to Wiper/Washer Rear System Check

--

11

  1. Disconnect the harness connector from the rear window wiper cutout switch.
  2. Connect a test light from the harness connector, terminal A, to ground.

Is the test light on?

--

Go to Step 12

Go to Step 15

12

  1. Close the rear window wiper cutout switch.
  2. Check the continuity between terminals A and B of the wiper cutout switch using a J 39200 .

Is there continuity?

--

Go to Step 13

Go to Step 14

13

Repair the open in CKT 393.

Is the repair complete?

--

Go to Wiper/Washer Rear System Check

--

14

Replace the rear window wiper cutout switch.

Is the replacement complete?

--

Go to Wiper/Washer Rear System Check

--

15

Backprobe from the rear wiper/washer switch connector, terminal C, to ground with a test light.

Is the test light on?

--

Go to Step 16

Go to Step 17

16

Repair the open in CKT 391.

Is the repair complete?

--

Go to Wiper/Washer Rear System Check

--

17

Replace the rear wiper/washer switch.

Is the replacement complete?

--

Go to Wiper/Washer Rear System Check

--